Brick-press.



W. E. d J. A. DOLE.

BRICK PRESS.

APPLICATION FILED JULY 18, 1910.

1,042,655. :Patented 00n.29,1912.

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y W. E. @L J. A. DOLE.

BRICK PRESS.

APPLICATION FILED JULY18,1910.

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BRICK PRESS.

APPLICATION FILED JULY 18, 1910.

Patented 001;.' 29, 1912.

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WILLIAM ENOS DOLE AND JOI-IN ADISON DOLE, 0F OAK HILL, OHIO.

BRICK-PRESS.

Specication of Letters Patent.

ratenteaoet. 29,1912.

Application led July 18, 1910. Serial No. 572,531.

To all wlw/m it may concern Beit known that we, W'ILLIAM ENos DOL-n and Jol-IN ADisoN DOLE, citizens of the United States, residing at Oak Hill, in the county of Jackson and State of Ohio, have invented certain new and useful Improvements in Brick-Presses, of which the following is a specification.

This invention relates to hand presses, such as are used for repressing brick, and the invention resides in the peculiar construction of the press whereby the various parts subject to wear in the use of the press are readily removable for replacement or repair withoutdismantling the press and without sacrificing an unduly large number of parts where replacement is necessary. Provision is also made where possible for the taking up of the-slack occasioned by wear, and the design of the press is such throughout that accessibility combined with simplicity of design is had.

The press belongs to the lever type and more specifically to the toggle lever type, in which the main operating lever is provided with a floating fulcrum to which is connected the cap plate of the brick mold so that the movement of the lever to retract the press plunger simultaneously releases the cap plate of the mold.

Further improvement resides in the construction of the brick ejecting mechanism.

The various essential features of the invention will be described in connection with a preferred embodiment thereof illustrated in the accompanying drawings, wherein Figure l is a side elevation of the complete press; Fig. 2 is a horizontal section taken on the line 6*?) of Fig. 3; Fig. 3 is a vertical section of the assembled machine the plane of section being on the line c-c of Fig. 2; Fig. l is a vertical section on the line eZ-rl of Fig. 3; Fig. 5 is a view of a portion of the press, the plane of section being upon the line e-e of Fig. l; Fig. 6 is a perspective view of the floating fulcrum and its guides, together with a bushing; Fig. 7 is a perspective View of the main operating lever; Fig. S is a perspective view of the plunger of the press; Fig. 9 is a perspective view of the plunger guide; Fig. 10 is a perspective view of the cam thrust block; and Fig. 11 is a perspective view of a floating fulcrum bearing.

The press is carried on a frame composed of the side pieces 1 and 2 which maybe of any suitable form. The sidej frames are tied together by cross bars 3 and wheels 4 are preferably provided so that the press may be readily moved from place to place. The frame is further tied together by the rectangular casting 5 held by the bolts 6. This casting 5 forms the mold or chamber 7 in which the brick is pressed. As is apparent from the drawings the mold 7 is open at the top and bottom, the top being closed by a movable cover 8 supported in a manner later to be described. Below the casting 5 the frame is further tied together by a casting 9, which forms the guide 10 for the press plunger. This guide 10 is octagonal in its cross section, and is adapted to guide the plunger 11 in a vertical direction, the plunger 11 carrying a head 12 which is forced upwardly from the bottom of the mold 7 in the act of pressing the brick.

It will be noted that the plunger l1 is provided with an aperture 13 in which is mounted a rolle-r let for a purpose later to be described. The casting 9, forming the guide 10 is provided with lateral projections 15 which are bolted to the side frames 1 and 2 and, as heretofore stated, tend to strengthen the same. One side of the guide 10 is closed by an adjustable cap or cover 16 (see Fig. 9). The sides of the opening in which this cover is inserted are extensions of two of the parallel sides of the guide so that the cap 16 fits between these parallel sides and is adjustable to take up the wear of the plunger. It will be noted that four of the faces of the plunger and its guide are diagonal' to the direction of movement of the cover plate 16, so that 'the slack due to wear will be taken up upon the plunger in all directions. The cover plate is drawn in by four bolts 17 threaded in the casting 9, while a set of distance bolts 18 having check nuts 19, which bolts are threaded in the cover plate 16 and bear against the casting 9, prevent the cap plate from being drawn so tight as to bind the plunger. In this manner a very accurate adjustment of the plunger is secured.

The cap plate 16 is provided with a slot 20 and when the plunger 11 is in its guide the aperture 13 and the slot 20 are in register. A lever 21 fulcrumed at 22 on the side frames, projects through the slot 2O into the aperture 13 bearing upon the under side of the roller 14. Adjustably connected by a clamp 23 to the opposite end of the lever 21 is a chain 24 which is attached to a treadle lever 25, in such a manner that by depress ing the treadle lever 25 the lever 21 bears against the roller 14 and lifts the plunger' 11 with its head 12 to eject the brick from the mold 7. TVhen this takes place it is understood that the cap plate 8 is swung to one side as will be apparent hereinafter. rThe lower end of the plunger' 11 is provided with a square aperture 26 into which lits the shank 27 of a cam block 28. This cam block is further supported by an arm 29 pivoted at 30 upon the frame of the press and eX- tending through an aperture 31 in the cam block. lVhen the treadle lever 25 is depressed the plunger 11 rises but the cam block 28 remains in its lower position from its weight7 the shank 27 sliding in the aperture 26.

llVhen brick are being pressed, the pressure is exerted upon the lower face of the cam block 28 and is thence transmitted through the plunger 11 to the head 12 upon which the brick rests. The cam block 28 is directly engaged by a roller 32 which is carried by the main lever 33. This roller 32 is supported on the ears 34 on the upper side of the lever 33. This lever is provided with a transverse aperture 35 below the ears 34 which is designed to be clamped about a fulcrum pin 36 through the action of the bolts 37, the casting being split at one side to permit this. Thus by setting up the bolts 37 the fulcrum shaft is firmly clamped in the casting of the main lever 33. Referring to Fig. 4 it will be seen that the fulcruin shaft 3G is taperedy at both ends where itprojects beyond the casting of the lever 33 and that bushings 38 are placed upon these tapered portions and are retained by washers 39 and keys 40. It will be noted that by using a taper key 40 and drawing` it firmly into place the bushings 38 may be driven upon the shaft 36 so as to bind thereon and turn with the shaft. Thus any wear at this bearing will be taken by the bushing and not by the shaft 36. Mounted on the bushings are the floating fulcrum bearings 41. These are of the form clearly indicated in Fig. 11 and have the chamfered faces 42 so that the fulcrum bearings 41 may be guided in a vertical direction between the guide brackets 43 (see Fig. 6). which are bolted to the side frames 1 and 2, as clearly indicated in Fig. 5. Thus the shaft 36 may have a rotary motion in the fulcrum bearings 41 and these bearings are capable of a limited movement in a vertical direction. It will be noted that the fulcrum bearings 41 are mounted adjacent the sides of the lever and that outside these fulcrum bearings and separated therefrom by washers 44 are mounted the draw rods 45, which are connected to a cross arm 46 designed to carry the cap plate 8. A handle 47 is attached to the cross bar 46 and since the draw rods 45 are mounted to turn upon the bushing 38 the cap plate 8 may readily be swung to one side of the mold when the shaftl 36 is in its elevated position. The washers 39 also serve to retain the draw rods in position upon the bushings 38.

ln the end of the lever remote from the fulcrum shaft 36 is forced a pivot pin 48. A shaft 49 which may be given a partial rotation through a hand lever 50 is provided with a crank arm 51 which is connected by links 52 to the pin 48. The bearings at the ends of these links are formed by inserting bushings clamped in place by the bolts 54, the ends of the links being split as clearly shown in Fig. 3 to permit them to be clamped about the bushii'igs by these bolts. The loA cation and proportion of the various parts is such that if the cap plate 8 is swung into position above the mold and the lever 50 is swung to the right as viewed in Fig. 1, the lever 33 will be drawn downwardly and the roller 32 will be swung to the right. As will be noted in Fig. 3, the center of the shaft 3G lies in the projected center line of the plunger 11. The result is that as the roller 32 moves to the right, the fulcruin bearing 41 and the shaft 3G first move downwardly until by means of the draw rods 45 the cap plate 8 is drawn firmly down upon the top of the cast-ing 5 forming the mold 7. A continued motion in this direction then causes through the action of the cam. block 28 an upward movement of the plunger 10 whereby the brick contained in the mold 7 is compressed between the cap plate 8 and the head 12 carried by the plunger 11. As the lever 50 is swung reversely to the left after having completed this pressing action, the plunger 11 moves downwardly until the heel portion 55 of the main lever 33 comes in contact with the stop plate This plate is supportedby pendant rods 57 attached to the main frame by nuts 58 so as to be adjustable to vary the position of the plate 56. After the heel portion 55 comes in contact with the plate 56 further movement of the lever 5() will cause the fulcrum shaft 36 to be slightly raised thus lifting the cover plate 8 so that it may be swung to one side to allow the brick to be ejected. A depression of the treadle 25 then causes the brick to be forcedy from the mold in the manner already described.

We are aware that presses having levers with floating fulcrums connected to the cap plate are well known in the art, and shall not broadly claim this structure, but by our peculiar construction we attain many ap-- parent advantages, certain of which we will enumerate for illustration. By arranging the plunger take-up diagonally we are able to take up wear in all directions with a single adjustment and by the use of the distance bolts 18 we are enabled to take up all slack without unduly cramping the plunger. The use of the roller 14 causes the upward thrust in the act of ejecting the brick to be almost central and removes all tendency of the plunger to cramp or bind, a defect present in all other brick presses of which we are aware. The formation of t ic main lever with the fulcrum shaft clamped in place and the tapered bushings is a valuable feature because without materially increasing the cost of construction of the press itl makes possible the ready replacement of worn bearings. This may be done without dismantling the press, for by withdrawing the key the washer 39 may be removed, the bushing withdrawn, and a new one substituted without releasing or changing any other portion of the press. Since this is the bearing perhaps most subjected to wear of any in the press, this feature is of utmost importance. The formation of the cam block 2S separately from the plunger ll permits the replacement of either of these parts without sacrifice of the other and, since both are subject to wear, this is a valuable feature.

Having thus described the invention what we claim is l. In a brick press the combination of a support-ing frame; a mold carried thereby a cover plate and a plunger both coacting with the mold; draw rods connected at one end to the cover plate and provided at the other end with bearings; fulcrum bearing guides carried by the frame; fulcrum bearings guided in said guides; and an actuating lever coacting with the plunger to operate the same, said lever comprising a main lever arm member, a fulcrum pin removably clamped therein and tapered at its ends, bushings forced into close frictional engagement with said tapered portions of the fulcrum pin and turning in the fulcrum bearings and in the draw rod bearings, and tapered keys passing through the fulcrum pin and serving to urge the bushings into frictional engagement therewith, the various parts being so arranged that by the removal of the tapered keys the bushings may be Withdrawn without dismantling the press.

2. In a brick press the combination of a supporting frame; a mold carried thereby; a cover plate and a plunger both coacting with the mold; draw rods connected at one end to the cover plate and provided at the other end with bearings; fulcrum bearing guides carried by the frame; fulcrum bearings guided in said guides; and an actuating lever coacting with the plunger to operate the same, said lever comprising a main lever arm member, a fulcrum pin mounted therein and tapered at its ends, bushings forced into close frictional engagement with said tapered portions of the fulcrum and turning in the fulcrum bearings and in the draw rod bearings, and means carried by the fulcrum pin and adapted to urge the bushings into such frictional engagement with the fulcrum pin.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

IVILLIAM ENOS DOLE. JOHN ADISON DOLE. lVitnesses:

E. T. LEWIS, J. C. MESSER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

